《乘法口訣表》PPT課件.ppt

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1、乘法口訣表,乘法口訣表,二二得四,一四得四,二三得六,一六得六,二四得八,一八得八,三三得九,一九得九,三四十二,二六十二,四四十六,二八十六,二九十八,三六十八,四六二十四,三八二十四,六六三十六,四九三十六,哪兩句口訣的積相同?,四,六,八,九,十二,十六,十八,二四,三六,利用口訣表，填出乘法表，你發(fā)現(xiàn)了什么？,1,2,3,4,5,6,7,8,9,2,4,6,8,10,12,14,16,18,3,6,9,12,15,18,21,24,27,4,8,12,16,20,24,28,32,36,5,10,15,20,25,30,35,40,45,6,12,18,24,30,36,42,48,5

2、4,7,14,21,28,35,42,49,56,63,8,16,24,32,40,48,56,64,72,9,18,27,36,45,54,63,72,81,1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9,2,4,6,8,10,12,14,16,18,3,6,9,12,15,18,21,24,27,4,8,12,16,20,24,28,32,36,5,10,15,20,25,30,35,40,45,6,12,18,24,30,36,42,48,54,7,14,21,28,35,42,49,56,63,8,16,24,32,40,48,56,64,72,9,18,27,36,45,54,63,72,81,1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9,利用口訣表，填出乘法表，你發(fā)現(xiàn)了什么？,（ ）里最大能填幾？,（ ）429 （ ）855,7（ ）29 （ ）638,435（ ） 60（ ）9,7,6,8,6,4,6,找規(guī)律填數(shù)。,85=（ ）8,97=（ ）9,49=（ ）6=（ ）,3（ ）=4（ ）=24,2（ ）=3（ ）=18,5,7,6,36,8,6,9,6,根據(jù)關(guān)系填空：,=28 =9 =11 =（ ）,15,